The idea that these and some 30 other behaviour patterns are cultural rather than genetic was supported by the fact that particular sub-species (which differ from one another genetically) are not associated with particular behaviours.
But in the meantime, I recommend the following website from Greenpeace which looks not only at Chernobyl but scores of other graphic and current biological crises throughout the world, including a story about the devastation in Sumatra, home to the last endemic sub-species of Orangutans.